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Finding the Third Proportional to 15,576 and 19,956

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Solution

The third proportional to 15,576 and 19,956 is: 25,567.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,576 : 19,956 = 19,956 : x
  2. Step 2: Convert to fraction form
    15,576/19,956 = 19,956/x
  3. Step 3: Cross multiply
    15,576x = 19,956 × 19,956
  4. Step 4: Simplify right side
    15,576x = 398,241,936
  5. Step 5: Solve for x
    x = 398,241,936/15,576
  6. Step 6: Final answer
    x = 25,567.66

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Why These Related Problems?

These problems maintain the same ratio (1.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.